Calibrating device for load cells

Details Calibrating device for load cells Calibrating device for load cells

1987-04-13

1988-02-02

Miller, Jr., George H.

Weighing scales

With testing

73 1B, 177146, G01G 1952, G01L 2500

Patent

active

047224070

ABSTRACT:
A device (100) for calibrating load cells is provided. Device (100) features an intermediate chamber (8) providing fluid communication between spaced-apart fluid chambers (4) and (6). Chambers (4) and (6) have respective upper open ends (5) and (7) with chamber (4) connected to a plunger member (12) by a flexible seal (14) and chamber (6) connected to a plunger member (20) by a flexible seal (18) such when dead weights W.sub.1, 2 . . . n are placed upon plunger (12) fluid pressure exerts an upward force (F) against plunger (20) for calibrating a load cell (2) placed between plunger (20) and a rigid frame (21) that is defined by the equation:

REFERENCES:
patent: 3194050 (1965-07-01), Ruge
patent: 3261203 (1966-07-01), Young
patent: 3736999 (1973-06-01), Lademann
patent: 3924443 (1975-12-01), Hebert
patent: 4009604 (1977-03-01), Taber et al.
patent: 4292835 (1981-10-01), Bickford
patent: 4309896 (1982-01-01), Laurent
patent: 4658921 (1987-04-01), Karpa

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